//*********************************************************
//16转10，否则输出-1
//*********************************************************
function Hex(c: char): Integer;
var
  x: Integer;
begin
  if ( Ord(c)>= Ord('0')) and (Ord(c) <= Ord('9')) then
    x:= Ord(c) - Ord('0')
  else if (Ord(c) >= Ord('a')) and (Ord(c) <= Ord('f')) then
    x:= Ord(c) - Ord('a') + 10
  else if (Ord(c) >= Ord('A')) and (Ord(c) <= Ord('F')) then
    x:= Ord(c) - Ord('A') + 10
  else
    x:= -1;                                       //输入错误
  Result:= x;
end;

//*******************************************************************
//该函数接收1~2个，字符转换成功后输出对应10进制数的值，否则输出-1
//*******************************************************************
function HexToInt(Str: string): Integer;
var
  tmpInt1, tmpInt2: Integer;
begin
  if Length(Str) = 1 then
  begin
    Result:= Hex(Str[1]);
  end
  else if Length(Str) = 2 then
  begin
    tmpInt1:= Hex(Str[1]);
    tmpInt2:= Hex(Str[2]);
    if (tmpInt1 = -1) or (tmpInt2 = -1) then
      Result:= -1
    else
      Result:= tmpInt1 * 16 + tmpInt2;
  end
  else
    Result:= -1;                                  //输入错误，转换失败
end;

//****************************
//字符串转换成ASCII码字符串
//****************************
function StrToHexStr(const S: string): string;
var
  i: Integer;
begin
  for i:= 1 to Length(S) do
  begin
    if i = 1 then
      Result:= IntToHex(Ord(S[1]), 2)
    else
      Result:= Result + ' ' + IntToHex(Ord(S[i]), 2);
  end;
end;

//***************************
//该函数去掉字符串中所有空格
//***************************
function TrimAll(Str: string): string;
var
  mLen, i: Integer;
begin
  mLen:= Length(Str);
  //初始化返回值
  Result:= '';
  for i:= 0 to mLen do
  begin
    //是空格就去掉
    if Str[i] = '' then
      Continue;
    Result:= Result + Str[i];
  end;
end;

//***************************
//十进制转换成二进制字符串
//***************************
function DTob(decimal:longint):string;
const symbols:string[16]='01';
var
  scratch:string;
  remainder:byte;
begin
  repeat
    remainder:=decimal mod 2;
    scratch:=symbols[remainder+1]+scratch;
    decimal:=decimal div 2;
  until(decimal=0);
  result:=scratch;
end;

//***************************
//十进制转换成十六进制字符串
//***************************

function DToHex(decimal:longint):string;
const symbols:string[16]='0123456789abcdef';
var
  scratch:string;
  remainder:byte;
begin
  repeat
    remainder:=decimal mod 16;
    scratch:=symbols[remainder+1]+scratch;
    decimal:=decimal div 16;
  until(decimal=0);
  result:=scratch;
end;